There is an incredible ecosystem of tools used for "data preparation" that it almost always necessitates defining what the usecase and workflow would be first. There are tools from UI-based to command-line-based.
Tools: Avora, FiveTran, Informatica, Excel, Alteryx, Datameer, Tableau Prep, etc. ... list could go on and on.
Tools: Avora, FiveTran, Informatica, Excel, Alteryx, Datameer, Tableau Prep, etc. ... list could go on and on.